diff --git a/bftengine/src/bcstatetransfer/AsyncStateTransferCRE.cpp b/bftengine/src/bcstatetransfer/AsyncStateTransferCRE.cpp
index fe0d8d63ca..ddb1cab14e 100644
--- a/bftengine/src/bcstatetransfer/AsyncStateTransferCRE.cpp
+++ b/bftengine/src/bcstatetransfer/AsyncStateTransferCRE.cpp
@@ -148,9 +148,7 @@ std::shared_ptr<ClientReconfigurationEngine> CreFactory::create(std::shared_ptr<
   for (uint16_t i = 0; i < repConfig.numReplicas; i++) {
     bftClientConf.all_replicas.emplace(bft::client::ReplicaId{i});
   }
-  for (uint16_t i = repConfig.numReplicas;
-       i < repConfig.numReplicas + repConfig.numRoReplicas + repConfig.numFnReplicas;
-       i++) {
+  for (uint16_t i = repConfig.numReplicas; i < repConfig.numReplicas + repConfig.numRoReplicas; i++) {
     bftClientConf.ro_replicas.emplace(bft::client::ReplicaId{i});
   }
   bftClientConf.replicas_master_key_folder_path = std::nullopt;
diff --git a/bftengine/src/bcstatetransfer/BCStateTran.cpp b/bftengine/src/bcstatetransfer/BCStateTran.cpp
index 8ca2a6ed1c..f774f2e810 100644
--- a/bftengine/src/bcstatetransfer/BCStateTran.cpp
+++ b/bftengine/src/bcstatetransfer/BCStateTran.cpp
@@ -3971,13 +3971,13 @@ void BCStateTran::computeDigestOfPage(
   if (checkpointNumber > 0) {
     digestGenerator.update(page, pageSize);
   }
-  digestGenerator.writeDigest(reinterpret_cast<char *>(&outDigest));
+  digestGenerator.writeDigest(outDigest.getForUpdate());
 }
 
 void BCStateTran::computeDigestOfPagesDescriptor(const DataStore::ResPagesDescriptor *pagesDesc, Digest &outDigest) {
   DigestGenerator digestGenerator;
   digestGenerator.update(reinterpret_cast<const char *>(pagesDesc), pagesDesc->size());
-  digestGenerator.writeDigest(reinterpret_cast<char *>(&outDigest));
+  digestGenerator.writeDigest(outDigest.getForUpdate());
 }
 
 void BCStateTran::computeDigestOfBlockImpl(const uint64_t blockNum,
@@ -3996,7 +3996,7 @@ void BCStateTran::computeDigestOfBlock(const uint64_t blockNum,
                                        const char *block,
                                        const uint32_t blockSize,
                                        Digest *outDigest) {
-  computeDigestOfBlockImpl(blockNum, block, blockSize, reinterpret_cast<char *>(outDigest));
+  computeDigestOfBlockImpl(blockNum, block, blockSize, outDigest->getForUpdate());
 }
 
 BlockDigest BCStateTran::computeDigestOfBlock(const uint64_t blockNum, const char *block, const uint32_t blockSize) {
diff --git a/bftengine/src/bftengine/FullNodeReplica.cpp b/bftengine/src/bftengine/FullNodeReplica.cpp
index 4151d793b8..f71a4ee511 100755
--- a/bftengine/src/bftengine/FullNodeReplica.cpp
+++ b/bftengine/src/bftengine/FullNodeReplica.cpp
@@ -44,12 +44,12 @@ FullNodeReplica::FullNodeReplica(const ReplicaConfig &config,
                                  concordUtil::Timers &timers,
                                  MetadataStorage *metadataStorage)
     : ReplicaForStateTransfer(config, requestsHandler, stateTransfer, msgComm, msgHandlerReg, true, timers),
-      ro_metrics_{metrics_.RegisterCounter("receivedCheckpointMsgs"),
+      fn_metrics_{metrics_.RegisterCounter("receivedCheckpointMsgs"),
                   metrics_.RegisterCounter("sentAskForCheckpointMsgs"),
                   metrics_.RegisterCounter("receivedInvalidMsgs"),
                   metrics_.RegisterGauge("lastExecutedSeqNum", lastExecutedSeqNum)},
       metadataStorage_{metadataStorage} {
-  LOG_INFO(GL, "Initialising ReadOnly Replica");
+  LOG_INFO(GL, "Initialising Full Node Replica");
   repsInfo = new ReplicasInfo(config, dynamicCollectorForPartialProofs, dynamicCollectorForExecutionProofs);
   msgHandlers_->registerMsgHandler(
       MsgCode::Checkpoint, std::bind(&FullNodeReplica::messageHandler<CheckpointMsg>, this, std::placeholders::_1));
@@ -72,7 +72,7 @@ FullNodeReplica::FullNodeReplica(const ReplicaConfig &config,
                      concord::crypto::KeyFormat::PemFormat}},
                    *repsInfo);
 
-  // Register status handler for Read-Only replica
+  // Register status handler for Full Node replica
   registerStatusHandlers();
   bft::communication::StateControl::instance().setGetPeerPubKeyMethod(
       [&](uint32_t id) { return SigManager::instance()->getPublicKeyOfVerifier(id); });
@@ -98,18 +98,18 @@ void FullNodeReplica::stop() {
 void FullNodeReplica::onTransferringCompleteImp(uint64_t newStateCheckpoint) {
   lastExecutedSeqNum = newStateCheckpoint * checkpointWindowSize;
 
-  ro_metrics_.last_executed_seq_num_.Get().Set(lastExecutedSeqNum);
+  fn_metrics_.last_executed_seq_num_.Get().Set(lastExecutedSeqNum);
   last_executed_seq_num_ = lastExecutedSeqNum;
 }
 
 void FullNodeReplica::onReportAboutInvalidMessage(MessageBase *msg, const char *reason) {
-  ro_metrics_.received_invalid_msg_++;
+  fn_metrics_.received_invalid_msg_++;
   LOG_WARN(GL,
            "Node " << config_.replicaId << " received invalid message from Node " << msg->senderId()
                    << " type=" << msg->type() << " reason: " << reason);
 }
 void FullNodeReplica::sendAskForCheckpointMsg() {
-  ro_metrics_.sent_ask_for_checkpoint_msg_++;
+  fn_metrics_.sent_ask_for_checkpoint_msg_++;
   LOG_INFO(GL, "sending AskForCheckpointMsg");
   auto msg = std::make_unique<AskForCheckpointMsg>(config_.replicaId);
   for (auto id : repsInfo->idsOfPeerReplicas()) send(msg.get(), id);
@@ -125,7 +125,7 @@ void FullNodeReplica::onMessage<CheckpointMsg>(std::unique_ptr<CheckpointMsg> ms
   if (isCollectingState()) {
     return;
   }
-  ro_metrics_.received_checkpoint_msg_++;
+  fn_metrics_.received_checkpoint_msg_++;
   LOG_INFO(GL,
            KVLOG(msg->senderId(),
                  msg->idOfGeneratedReplica(),
@@ -208,12 +208,12 @@ void FullNodeReplica::onMessage<ClientRequestMsg>(std::unique_ptr<ClientRequestM
   span.setTag("cid", msg->getCid());
   span.setTag("seq_num", reqSeqNum);
 
-  // A read only replica can handle only reconfiguration requests. Those requests are signed by the operator and
+  // A full node replica can handle only reconfiguration requests. Those requests are signed by the operator and
   // the validation is done in the reconfiguration engine. Thus, we don't need to check the client validity as in
   // the committers
 
   if (reconfig_flag) {
-    LOG_INFO(GL, "ro replica has received a reconfiguration request");
+    LOG_INFO(GL, "FN replica has received a reconfiguration request");
     executeReadOnlyRequest(span, *(msg.get()));
     return;
   }
@@ -221,7 +221,7 @@ void FullNodeReplica::onMessage<ClientRequestMsg>(std::unique_ptr<ClientRequestM
 
 void FullNodeReplica::executeReadOnlyRequest(concordUtils::SpanWrapper &parent_span, const ClientRequestMsg &request) {
   auto span = concordUtils::startChildSpan("bft_execute_read_only_request", parent_span);
-  // Read only replica does not know who is the primary, so it always return 0. It is the client responsibility to treat
+  // full node replica does not know who is the primary, so it always return 0. It is the client responsibility to treat
   // the replies accordingly.
   ClientReplyMsg reply(0, request.requestSeqNum(), config_.getreplicaId());
   const uint16_t clientId = request.clientProxyId();
@@ -247,7 +247,7 @@ void FullNodeReplica::executeReadOnlyRequest(concordUtils::SpanWrapper &parent_s
   const uint32_t actualReplyLength = single_request.outActualReplySize;
   const uint32_t actualReplicaSpecificInfoLength = single_request.outReplicaSpecificInfoSize;
   LOG_DEBUG(GL,
-            "Executed read only request. " << KVLOG(clientId,
+            "Executed full node request. " << KVLOG(clientId,
                                                     lastExecutedSeqNum,
                                                     request.requestLength(),
                                                     reply.maxReplyLength(),
@@ -269,7 +269,7 @@ void FullNodeReplica::executeReadOnlyRequest(concordUtils::SpanWrapper &parent_s
     }
 
   } else {
-    LOG_ERROR(GL, "Received error while executing RO request. " << KVLOG(clientId, executionResult));
+    LOG_ERROR(GL, "Received error while executing FN request. " << KVLOG(clientId, executionResult));
   }
   ClientReplyMsg replyMsg(
       0, request.requestSeqNum(), single_request.outReply, single_request.outActualReplySize, executionResult);
@@ -278,7 +278,7 @@ void FullNodeReplica::executeReadOnlyRequest(concordUtils::SpanWrapper &parent_s
 
 void FullNodeReplica::registerStatusHandlers() {
   auto h = concord::diagnostics::StatusHandler(
-      "replica-sequence-numbers", "Last executed sequence number of the read-only replica", [this]() {
+      "replica-sequence-numbers", "Last executed sequence number of the full node replica", [this]() {
         concordUtils::BuildJson bj;
 
         bj.startJson();
diff --git a/bftengine/src/bftengine/FullNodeReplica.hpp b/bftengine/src/bftengine/FullNodeReplica.hpp
index 61f1ca1578..2b2e4f7f37 100644
--- a/bftengine/src/bftengine/FullNodeReplica.hpp
+++ b/bftengine/src/bftengine/FullNodeReplica.hpp
@@ -33,7 +33,8 @@ class FullNodeReplica : public ReplicaForStateTransfer {
 
   void start() override;
   void stop() override;
-  virtual bool isReadOnly() const override { return true; }
+  virtual bool isReadOnly() const override { return false; }
+  virtual bool isFullNode() const override { return true; }
 
  protected:
   void sendAskForCheckpointMsg();
@@ -64,15 +65,15 @@ class FullNodeReplica : public ReplicaForStateTransfer {
     concordMetrics::CounterHandle sent_ask_for_checkpoint_msg_;
     concordMetrics::CounterHandle received_invalid_msg_;
     concordMetrics::GaugeHandle last_executed_seq_num_;
-  } ro_metrics_;
+  } fn_metrics_;
 
   std::unique_ptr<MetadataStorage> metadataStorage_;
   std::atomic<SeqNum> last_executed_seq_num_{0};
 
  private:
   // This function serves as an ReplicaStatusHandlers alternative for FullNodeReplica. The reason to use this function
-  // is that regular and read-only replicas expose different metrics and the status handlers are not interchangeable.
-  // The read-only replica also hasn't got an implementation for InternalMessages which are used by the
+  // is that regular and full node replicas expose different metrics and the status handlers are not interchangeable.
+  // The full node replica also hasn't got an implementation for InternalMessages which are used by the
   // ReplicaStatusHandler.
   void registerStatusHandlers();
 };
diff --git a/bftengine/src/bftengine/ReadOnlyReplica.hpp b/bftengine/src/bftengine/ReadOnlyReplica.hpp
index 5d1951b173..4bc0b5461a 100644
--- a/bftengine/src/bftengine/ReadOnlyReplica.hpp
+++ b/bftengine/src/bftengine/ReadOnlyReplica.hpp
@@ -34,6 +34,7 @@ class ReadOnlyReplica : public ReplicaForStateTransfer {
   void start() override;
   void stop() override;
   virtual bool isReadOnly() const override { return true; }
+  virtual bool isFullNode() const override { return false; }
 
  protected:
   void sendAskForCheckpointMsg();
diff --git a/bftengine/src/bftengine/ReplicaBase.hpp b/bftengine/src/bftengine/ReplicaBase.hpp
index 7799fb4820..f1650969b9 100644
--- a/bftengine/src/bftengine/ReplicaBase.hpp
+++ b/bftengine/src/bftengine/ReplicaBase.hpp
@@ -50,6 +50,8 @@ class ReplicaBase {
 
   virtual bool isReadOnly() const = 0;
 
+  virtual bool isFullNode() const = 0;
+
   std::shared_ptr<MsgsCommunicator> getMsgsCommunicator() const { return msgsCommunicator_; }
   std::shared_ptr<MsgHandlersRegistrator> getMsgHandlersRegistrator() const { return msgHandlers_; }
   concordUtil::Timers* getTimers() { return &timers_; }
diff --git a/bftengine/src/bftengine/ReplicaFactory.cpp b/bftengine/src/bftengine/ReplicaFactory.cpp
index 1bf85d2873..c8879fb368 100644
--- a/bftengine/src/bftengine/ReplicaFactory.cpp
+++ b/bftengine/src/bftengine/ReplicaFactory.cpp
@@ -96,7 +96,7 @@ void ReplicaInternal::restartForDebug(uint32_t delayMillisec) {
     }
   }
 
-  if (!replica_->isReadOnly()) {
+  if (!replica_->isReadOnly() && !replica_->isFullNode()) {
     auto replicaImp = dynamic_cast<ReplicaImp *>(replica_.get());
 
     shared_ptr<PersistentStorage> persistentStorage(replicaImp->getPersistentStorage());
diff --git a/bftengine/src/bftengine/ReplicaImp.hpp b/bftengine/src/bftengine/ReplicaImp.hpp
index 5f443b9232..4d79f4311b 100644
--- a/bftengine/src/bftengine/ReplicaImp.hpp
+++ b/bftengine/src/bftengine/ReplicaImp.hpp
@@ -366,6 +366,8 @@ class ReplicaImp : public InternalReplicaApi, public ReplicaForStateTransfer {
 
   virtual bool isReadOnly() const override { return false; }
 
+  virtual bool isFullNode() const override { return false; }
+
   shared_ptr<PersistentStorage> getPersistentStorage() const { return ps_; }
   std::shared_ptr<concord::secretsmanager::ISecretsManagerImpl> getSecretsManager() { return sm_; }
 
diff --git a/bftengine/src/preprocessor/PreProcessor.cpp b/bftengine/src/preprocessor/PreProcessor.cpp
index 062933ac42..bdc3e86da5 100644
--- a/bftengine/src/preprocessor/PreProcessor.cpp
+++ b/bftengine/src/preprocessor/PreProcessor.cpp
@@ -407,8 +407,7 @@ PreProcessor::PreProcessor(shared_ptr<MsgsCommunicator> &msgsCommunicator,
       myReplicaId_(myReplica.getReplicaConfig().replicaId),
       maxExternalMsgSize_(myReplica.getReplicaConfig().maxExternalMessageSize),
       responseSizeInternalOverhead_{/* for conflict detection BlockId */ sizeof(uint64_t)},
-      numOfReplicas_(myReplica.getReplicaConfig().numReplicas + myReplica.getReplicaConfig().numRoReplicas +
-                     myReplica.getReplicaConfig().numFnReplicas),
+      numOfReplicas_(myReplica.getReplicaConfig().numReplicas + myReplica.getReplicaConfig().numRoReplicas),
       numOfClientProxies_(myReplica.getReplicaConfig().numOfClientProxies),
       clientBatchingEnabled_(myReplica.getReplicaConfig().clientBatchingEnabled),
       threadPool_("PreProcessor::threadPool"),
diff --git a/examples/replica/src/SetupReplica.cpp b/examples/replica/src/SetupReplica.cpp
index 485e78ba65..1833a29e43 100644
--- a/examples/replica/src/SetupReplica.cpp
+++ b/examples/replica/src/SetupReplica.cpp
@@ -202,8 +202,8 @@ bft::communication::ICommunication* SetupReplica::createCommunication(
   logging::Logger logger = getLogger();
   TestCommConfig testCommConfig(logger);
   testCommConfig.GetReplicaConfig(replicaConfig.replicaId, keysFilePrefix, &replicaConfig);
-  uint16_t numOfReplicas = (uint16_t)(3 * replicaConfig.fVal + 2 * replicaConfig.cVal + 1 +
-                                      replicaConfig.numRoReplicas + replicaConfig.numFnReplicas);
+  uint16_t numOfReplicas =
+      (uint16_t)(3 * replicaConfig.fVal + 2 * replicaConfig.cVal + 1 + replicaConfig.numRoReplicas);
   auto numOfClients =
       replicaConfig.numOfClientProxies ? replicaConfig.numOfClientProxies : replicaConfig.numOfExternalClients;
 #ifdef USE_COMM_PLAIN_TCP
diff --git a/kvbc/src/Replica.cpp b/kvbc/src/Replica.cpp
index 94c6229f41..227a12c227 100644
--- a/kvbc/src/Replica.cpp
+++ b/kvbc/src/Replica.cpp
@@ -64,9 +64,9 @@ Status Replica::initInternals() {
         bftEngine::ReplicaConfig::instance().pathToOperatorPublicKey_,
         bftEngine::ReplicaConfig::instance().operatorMsgSigningAlgo,
         *this));
-    if (replicaConfig_.isReadOnly || replicaConfig_.isFullNode) {
+    if (replicaConfig_.isReadOnly) {
       LOG_INFO(logger,
-               "Read Replica Status:" << KVLOG(getLastBlockNum(), getLastBlockId(), getLastReachableBlockNum()));
+               "ReadOnly Replica Status:" << KVLOG(getLastBlockNum(), getLastBlockId(), getLastReachableBlockNum()));
       m_replicaPtr = bftEngine::ReplicaFactory::createRoReplica(
           replicaConfig_, requestHandler, m_stateTransfer, m_ptrComm.get(), m_metadataStorage);
     } else {
diff --git a/kvbc/src/reconfiguration_kvbc_handler.cpp b/kvbc/src/reconfiguration_kvbc_handler.cpp
index c4f72f7489..7e2a284cd8 100644
--- a/kvbc/src/reconfiguration_kvbc_handler.cpp
+++ b/kvbc/src/reconfiguration_kvbc_handler.cpp
@@ -464,8 +464,7 @@ bool KvbcClientReconfigurationHandler::handle(const concord::messages::ClientRec
                                               const std::optional<bftEngine::Timestamp>& ts,
                                               concord::messages::ReconfigurationResponse& rres) {
   concord::messages::ClientReconfigurationStateReply rep;
-  uint16_t first_client_id = ReplicaConfig::instance().numReplicas + ReplicaConfig::instance().numRoReplicas +
-                             ReplicaConfig::instance().numFnReplicas;
+  uint16_t first_client_id = ReplicaConfig::instance().numReplicas + ReplicaConfig::instance().numRoReplicas;
   if (sender_id > first_client_id) {
     for (uint8_t i = kvbc::keyTypes::CLIENT_COMMAND_TYPES::start_ + 1; i < kvbc::keyTypes::CLIENT_COMMAND_TYPES::end_;
          i++) {
@@ -699,10 +698,7 @@ bool ReconfigurationHandler::handle(const concord::messages::AddRemoveWithWedgeC
   auto execute_key_prefix =
       std::string{kvbc::keyTypes::reconfiguration_client_data_prefix,
                   static_cast<char>(kvbc::keyTypes::CLIENT_COMMAND_TYPES::CLIENT_SCALING_EXECUTE_COMMAND)};
-
-  for (auto i = 0; i < ReplicaConfig::instance().numReplicas + ReplicaConfig::instance().numRoReplicas +
-                           ReplicaConfig::instance().numFnReplicas;
-       i++) {
+  for (uint64_t i = 0; i < ReplicaConfig::instance().numReplicas + ReplicaConfig::instance().numRoReplicas; i++) {
     concord::messages::ClientsAddRemoveExecuteCommand cmd;
     cmd.config_descriptor = command.config_descriptor;
     if (token.find(i) == token.end()) continue;
diff --git a/tests/simpleKVBC/TesterReplica/setup.cpp b/tests/simpleKVBC/TesterReplica/setup.cpp
index 4d74a34c41..af8e1620df 100644
--- a/tests/simpleKVBC/TesterReplica/setup.cpp
+++ b/tests/simpleKVBC/TesterReplica/setup.cpp
@@ -370,8 +370,8 @@ std::unique_ptr<TestSetup> TestSetup::ParseArgs(int argc, char** argv) {
 
     TestCommConfig testCommConfig(logger);
     testCommConfig.GetReplicaConfig(replicaConfig.replicaId, keysFilePrefix, &replicaConfig);
-    uint16_t numOfReplicas = (uint16_t)(3 * replicaConfig.fVal + 2 * replicaConfig.cVal + 1 +
-                                        replicaConfig.numRoReplicas + replicaConfig.numFnReplicas);
+    uint16_t numOfReplicas =
+        (uint16_t)(3 * replicaConfig.fVal + 2 * replicaConfig.cVal + 1 + replicaConfig.numRoReplicas);
     auto numOfClients =
         replicaConfig.numOfClientProxies ? replicaConfig.numOfClientProxies : replicaConfig.numOfExternalClients;
     std::shared_ptr<concord::secretsmanager::ISecretsManagerImpl> sm_ =